CycleSync vs RYTEX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CycleSync
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Умный календарь менструаций с точными прогнозами. Алгоритм анализирует историю ваших циклов для предсказания даты следующих месячных с высокой точностью. Отмечайте начало и конец цикла, интенсивность выделений и любые отклонения от нормы. Калькулятор овуляции и фертильности. Отслеживайте наиболее благоприятные дни для зачатия с помощью точного расчёта окна фертильности. Визуальные индикаторы помогут легко ориентироваться в календаре. Подробная статистика и аналитика. Просматривайте историю циклов, анализируйте регулярность и отслеживайте средние показатели. Приложение покажет среднюю длину цикла и продолжительность менструации. Отслеживание симптомов и самочувствия. Четыре уровня интенсивности выделений, множество симптомов для отслеживания, базальная температура для точного определения овуляции и личные заметки для каждого дня. Режим беременности. Подсчёт недель беременности, расчёт предварительной даты родов, визуальные индикаторы по триместрам. Уведомления о цикле отключаются автоматически при начале отслеживания беременности. Умные уведомления и напоминания. Напоминание о менструации за один до пяти дней до начала. Напоминание об овуляции за один до трёх дней до овуляции. Ежедневное напоминание отметить день в выбранное время. Напоминание о приёме таблеток в установленное время.
RYTEX
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Know Your Rhythm. RYTEX is a private, ad-free period and cycle tracker. Your health data lives on your device — always. TRACK YOUR CYCLE • Period & ovulation predictions • Symptom tracking (mood, cramps, energy, sleep and more) • Daily & monthly cycle insights • Irregular cycle support PLAN AHEAD See your predicted period dates for the next 3 and 6 months. Plan your vacation, your important days, your life — without surprises. PARTNER SHARING • Share your cycle privately with your partner • Sharing starts only with your invitation and their explicit acceptance • End-to-end encrypted — no one can read it, not even us • You control what they see, and you can stop sharing anytime TRULY PRIVATE • Your health data stays on your device • Anything you share is end-to-end encrypted • No ads. Ever. • No data selling. Ever. • No account required to start HEALTH INSIGHTS • Science-based cycle analysis • PMS & ovulation pattern detection • Doctor report export (PDF) SPARK Something your partner can send you. Something you can send back. Only visible when you open the app. No notification. No trace. Some things don't need words. DISCREET BY DESIGN All notifications are private. No period dates. No symptom details. No cycle info. Just a gentle nudge — nothing more. Your health is yours alone. RYTEX PREMIUM Partner sharing, SPARK and the doctor report are part of RYTEX Premium (monthly or yearly subscription). One subscription covers you both: premium for either partner is enough. Cycle tracking, predictions, symptoms and insights are always free. Apple Health: RYTEX can import your past Menstrual Flow records from the Health app (read-only) so you keep your history when switching from another period tracker. Settings → Data Transfer → Import from Health. — MEDICAL DISCLAIMER RYTEX is not a medical device and does not provide medical advice, diagnosis, or treatment. It is not a diagnostic tool and must not be used as contraception. Predictions and insights are for informational purposes only. Always seek the advice of a qualified healthcare professional in addition to using this app, and before making any medical decisions or changing your treatment. Terms of Use (EULA): https://rytex.app/terms Privacy Policy: https://rytex.app/privacy
Screenshots
Verdict
The clearest difference is update cadence: CycleSync at every 2 days against RYTEX's every 6 days. RYTEX's advantage is iOS requirement (15.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
CycleSync ships an update every 2 days, RYTEX every 6 days. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.
| Parameter | CycleSync | RYTEX |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days — better | Every 6 days |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 52 MB |
| Age rating | 17+ | 12+ |
| Developer | Sergei Antropov | Omer Dulger |
In-app purchases
CycleSync
No in-app purchases
RYTEX
No in-app purchases









